For me, it raises the question of why they are eating brownies in the first place. For me, it's sometimes nice to have a sweet snack when I am relaxing at night. How in the world can a black bean brownie be a satisfying snack? It defies logic.
* Edited to add that my Mom refused to cook or serve meat when I was growing up. The only meat substitute items in the 70's came out of a can and they tasted like ass. She still wouldn't have made black bean brownies.